Pervasive carbonation of peridotite to listvenite (Semail Ophiolite, Sultanate of Oman): clues from iron partitioning and chemical zoning

Decrausaz, Thierry; Godard, Marguerite; Menzel, Manuel D.; Parat, Fleurice; Oliot, Emilien; Lafay, Romain; Barou, Fabrice

doi:https://doi.org/10.5194/ejm-35-171-2023

Articles | Volume 35, issue 2

https://doi.org/10.5194/ejm-35-171-2023

© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/ejm-35-171-2023

© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 35, issue 2

Research article

|

21 Mar 2023

Research article |

| 21 Mar 2023

Pervasive carbonation of peridotite to listvenite (Semail Ophiolite, Sultanate of Oman): clues from iron partitioning and chemical zoning

Thierry Decrausaz, Marguerite Godard, Manuel D. Menzel, Fleurice Parat, Emilien Oliot, Romain Lafay, and Fabrice Barou

Supplement

https://doi.org/10.5194/ejm-35-171-2023-supplement

Data sets

Major and trace element mineral compositions of carbonated serpentinites and listvenites from Oman Drilling Project Hole BT1B (Semail Ophiolite, Oman) T. Decrausaz, M. Godard, M. Menzel, F. Parat, E. Oliot, R. Lafay, and F. Barou https://doi.org/10.26022/IEDA/112686

Short summary

The carbonation of peridotites occurs during the fluxing of reactive CO²-bearing fluids, ultimately producing listvenites (magnesite and quartz assemblage). We studied the most extended outcrops of listvenites worldwide, found at the base of the Semail Ophiolite (Oman). Our study highlights the partitioning of iron during early pervasive carbonation revealed by chemical zoning in matrix magnesites, and we discuss the conditions favoring the formation of Fe-rich magnesite.